On three new and curious Forms of Arachnida. 383 



My. 3. The nervous ganglia and ring, much enlarged. A, superior gan- 

 glion ; B, inferior ganglion. 



Fig. 4. a, groups of brightly coloured fatty globules forming the con- 

 tents of the diverticula of the intestine ; b, portion of the vas- 

 cular trunk, much enlarged. 



Fig. 5. Portion of the invaginated proboscis, much enlarged, a, external 

 gelatinous layer ; h, internal muscular layer ; c, cavity continuous 

 with that of the proboscis-sac ; within these the invaginated 

 portion of the proboscis with the layers reversed ; b, internal 

 muscular layer; a, external gelatinous layer; d, central tube 

 tilled with dark amorphous matter (from the proboscis-sac ?). 



LIII. — On three new and curious Forms of Arachnida. By 

 the Rev. O. P. Cambridge, M.A., C.M.Z.S., Hon. Memb. 

 N.Z. Inst. 



[Plate XIII.] 



The three singular Arachnids described in the following 

 pages belong to . widely separated localities. The first ( Ga- 

 lyptostoma Hardily upon which I have based a new genus of 

 the family Trombidides in the order Acaridea) is a British 

 form, discovered by Mr. James Hardy (of Old Cambus, Ber- 

 wickshire) on Cheviot Hill, Northumberland, aud sent to me 

 among numerous examples of spiders. The second ( West- 

 woodia obtecta) is of the order Phalangidea, and appears to me 

 incapable of inclusion in any family or genus hitherto charac- 

 terized ; it is altogether one of the most remarkable Arachnids 

 that have lately come under my notice : owing, however, to 

 the minuteness of the creature itself (less than 1 line in length), 

 and the necessarily still more minute and curiously concealed 

 mouth-parts, the special structure of these important features 

 is uncertain ; and their minuteness also almost precludes the 

 possibility of satisfactory dissection. Probably, when in use, 

 the parts of the mouth (the palpi and falces at least) could be 

 extruded ; so that we must await the examination of living 

 specimens for further knowledge of their structure. This 

 minute Arachnid was received from Otago (New Zealand), 

 where it was found by Capt. F. W. Hutton, and kindly sent to 

 me among other examples of this class. The third is also 

 of the order Phalangidea, family Cyphophthalmides (Joseph), 

 genus Cyphophthalmus (ejusd.), of which it is a very distinctnew 

 species ; it was sent to me, among numerous other new and 

 rare Arachnids, from Ceylon, by Mr. G. H. K. Thwaites. 

 For this, which in its general appearance bears a strong re- 

 semblance to some forms of Hemiptera heteroptera, I propose 

 the name of CypJwphihalmm cimiciformis. 



