314 PEOr. T. E. JONES ON- THE OSTEACODA 



abundant and characteristic IJpper-Purbeck species and the prede- 

 cessor of Cypridea valclemis of the Wealden formation. It is 

 mentioned in the Cat. Foss. Miis. Pract. G-eol. 1865, as belonging to 

 the Upper Purbeck, probably by mistake. 



E. Forhes's Letter, July 18, 1851. — The sketches in E. Forbes's 

 letter to Mr. Bristow, dated only " Friday, 18th," but, from internal 

 evidence, written in July 1851, are : — 



I. For the Upper Purbeck: — 1. " Cyjpris spinosa : a large black 

 Cypris in some beds, with very prominent spines." This is probably 

 an exaggerated form of Cypridea tuherculata (Sow.), which in some 

 cases has larger tubercles than in others. 2. " A usually dark or 

 black species, smooth to the eye, but really punctate ; . C. gihhosa, 

 perhaps identical with C. valdensisJ^ This I take to be E. Forbes's 

 punctata and its variety gibhosa. 3. " A very small fellow, like 

 snail's dung, shaped like a pea-pod." This is called " C. leguwdnel- 

 loides," and is evidently the leguminella of Lyell's list. 



II. In the Middle Purbeck : — 1. " A granulated species ; scarce : 

 C. gramdosa." iN'ot the gramdosa of Sowerby, though evidently 

 thought to be so here and when given as granulata in LyeU's list 

 (1855) and in the MS. note of 1854. 2. " C. fasciculata. A 

 fasciculated species, perhaps a variety of granulosa ; with two little 

 bundles of tubercles, one at each end. This is the most charac- 

 teristic Middle-Purbeck species." It is the fascicidata of Lyell's 

 tig. 371, h ; and it is essentially the same as Cypridea granulosa 

 (Sow.). 3. "An oblong species, with punctations and striations 

 both ; C. striatopunctata. This is rare, and only in the ' Inter- 

 marine Beds.' " Probably named after Eomer's striatopunctata, but 

 it matches neither Eomer's nor Bunker's figures and descriptions, 

 and Prof. Dr. Bunker* believed it to be different. 4. " I have 

 notes also of a peapod-shaped species, larger than that of the" 

 [leguminelloides']. This larger peapod-form is probably my Cyprione 

 Bristovii. 



III. " In the Lower Purbeck the Cyprides are all smooth and 

 oblongt, and rather fat : Cypris purhecJcensis." This sketch is free 

 from the false margin referred to above (p. 313). 



K Forhes's Letter to T. R. Jones. — In his note of July 23, 1854, 

 Prof. E. Forbes informed me whereabouts the Purbeck "Cyprides " 

 were to be found (just about as now) in the Museum at Jermyn 

 Street, and enumerated the following names, as "given to the 

 principal ones," together with small rough sketches : — 

 '* Gyp. tuherculata?, 



leguminella, 



granulata, 



fascicidata, 



punctata, 



purhecTcensis (smooth), 



striatopunctata.^'' 



* In letter. (See further on, id. 319, note.) 



t By these two features C. punctata is shut out from the Lower Purbeck, in 

 which Bristow (m Damon's ' Geolog>' of Weymouth ' &c., new edition) and 

 Lyell give it by mistake. 



