DR. T. DAVIDSON OX EECENT BEACHIOPODA. 147 



Uncertain Species. 



83. ARGiorK GLOBULiFOEMis, Scliulgiii. (Plate XXII. fig. 28.) 



Argiope globuliformis, Scliulgin, Zeitscbr. f. wiss. Zool. Bd. xli. p. 1:21, pi. viii. fig. 2, 188 i. 



Shell small, ellipsoid, globular ; valves smooth, inflated, of a yellowish colour ; beak 

 not very projecting, wide ; foramen incomplete, transversely oval. In the interior of the 

 dorsal valve there are three submarginal ^epta. In the ventral valve one low median 

 septum. Diameter 7 millim. 



Ilab. Obtained by Sehulgiu on stones off Sardinia, and near the islands of Ilyeres ; 

 it was not found at Villafranea. 



Obs. I have never seen this shell and have no further knowledge of it tliau Schulgin's 

 very brief description and figure affords. It is said to have tlu-ee submarginal septa in 

 the dorsal valve, and must consequently be placed in the genus Ai'giope. 



81. Argiope Barroisi, Schulgin. (Plate XXII. fig. 29.) 



Argiope Barroisi, Schulgin, Zeitschr. f. wiss. Zool. Bd. xli. j). 1:2"J, pi. vii. fig. 4, 1884. 



Shell small, squarely transversely oblong, wider than long ; hinge-line straight, less 

 than the breadth of the shell. Valves moderately convex, ornamented with from eight 

 to eleven rounded ribs. Colour light yellowish orange ; interspaces between ribs bright 

 red. Beak moderately produced ; foramen large, circular, incomplete, margined ante- 

 riorly by a part of the umbo of the dorsal valve. In the interior of the dorsal valve there 

 are three high submarginal septa, and a single low one in the ventral valve. Breadth 

 3 "6 millim. ; length 3 millim. 



Hub. It oecui's frequently on Posidonia and upon stones at Villafranea, along 

 w'ith Cistclla Kowalevskii at a depth of 30 metres ; also off Sardinia, Xaples, and tlie 

 islands of Hyeres. 



Obs. I have never seen this shell, and know nothing more of it than is contained in 

 Schulgin's brief description. Ilis figure does not quite satisfy me. As it is said that 

 three septa exist in the dorsal valve, it is an Argiope. 



85. CiSTELLA Kowalevskii, Schulgin, sp. (Plate XXII. figs. 26 & 27.) 



Argiope Koti-alevskii, Schulgin, Zeitschr. f. wiss. Zool. Bd. xli. p. \2\l, pi. viii. figs. 5-9 & 12, pi. ix. 

 figs. 14-18, 188L 



Shell very small, from 3 to 8 millim. in length by 3 millim. in breadth, heart-shaped, 

 broadest and rounded anteriorly, tapering somewhat posteriorly. Valves gently convex, 

 thin, shining, and sharp at their edges, marked with a few concentric lines of growth and 

 widely separated punctures ; beak short, triangular, both it and the umbonc of the opposite 

 valve excavated for the passage of the cyUndrical-shaped pedimcle. In the interior of the 

 dorsal valve one short thick submarginal septum ; in the ventral valve a thin, low, long 

 septum. Colour yellow, 



SECOND series. — ZOOLOGY, VOL. IV. 20 



