NOTE ON TWO SPECIES OF CUCUMAKIA FROM PLYMOUTH. 309 



Coming now to the question of the nomenclature of the two species 

 of Cucumaria, which for convenience have liitherto in this paper been 

 referred to merely as species ' 1 ' and ' 2.' It is unfortunate that the 

 name 3fontaf/vi cannot be retained for sjk 1, more especially as this form 

 would in consequence appear to be as yet without a legitimate name ; 

 to meet this deficiency I would propose that the species l)e called 

 CucK inn rill Normani. liegarding the second species, this would appear 

 to be the same as a form described more than thirty years since by 

 Brady and Eobertson (1) from the West of Ireland as Cucumaria 

 saxicola, but which has since remained a ' doubtful ' species. 



Cucumaria Nonnani, n. sp. 

 1808: '' Hulothuria Fcntactes, var.'' : G. Montagu, Trans. Linn. Soc, 



vol. ix. p. 112, pi. vii., fig. 4. 

 1893, Dec: "Cucumaria Montaffui {Y\e,nmv^)" : A. M. Norinftii, Ann. 

 Mag. Nat. Hist., ser. 6, vol. xii. p. 469 [excl. specimens ' B ' 

 and ' C ' and synonymy]. 

 Diagnosis. — Body of uniform dirty white or brownish colour, neck 

 and bases of tentacles darkly pigmented, the pigment diffused. Test 

 very coriaceous, densely crowded with deposits. Body-spicule typically 

 lozenge-shaped, nodulous, and with four symmetrically disposed perfora- 

 tions. The foramina on the long axis of the spicule smaller and nearly 

 circular, those of the short axis larger and elliptical in outline, the long 

 axes of the foramina parallel to that of the spicule. U})per body-spicule 

 campanulate, typically with four short arms which, arising from tiie ends 

 of a short cross-bar, curve down to, and are inserted on a nodulous 

 circular rim. 



Habitat. — Plymouth, on rocky ground, L.W. — 10 fnis. The type- 

 specimen from Blackstone Bocks, Wembury Bay. 



Type-Specimen. — Has been acquired by the British Museum. 



REFERENCES. 



1. Brady, G. S., ami RoluTtson, D. — DescvipLions of two lu-w Sjn'ries of BriLiiih 



Hoiotluiroidea. Proc. Zool. Soc, vol. 1871, pp. 690-2, ply. Ixxi. lx.\ii. 



2. Fleiuing, Jolni. — A Hi.story of British Animals, exliil)itiiig llie Descriptive 



Cliaractors and Systematic Arrangement. . . . Edinlmrgli, 1828. 



3. Kd'hler, R.— Sur la Delormination et la Synonymie de (pielques HoloUuiries. 



Bull. Sci. France Belg., ser. 4, vol. iv, pp. 353-66 ; Sept. 189r). 



4. Montagu, George. — Description of several Marine Animals found on the South 



Coast of Devon-shire. Trans. Linn. Soc, vol. ix. pp. 81-114 ; 1808. 



5. Norman, A. ^i.—Chicumaria Mouhujui (Fleming) and its Synonymy. Ann. Mag. 



Nat. Hist., ser. 6, vol. xii. pp. 469-73 ; Dec. 1893. 



